一步步开发自己的博客 .NET版（5、Lucenne.Net 和 必应站内搜索）

这次开发的博客主要功能或特点：

第一：可以兼容各终端，特别是手机端。

第二：到时会用到大量html5，炫啊。

第三：导入博客园的精华文章，并做分类。（不要封我）

第四：做个插件，任何网站上的技术文章都可以转发收藏 到本博客。

public class PanGuLuceneHelper  {   private PanGuLuceneHelper() { }   #region 单一实例   private static PanGuLuceneHelper _instance = null;   /// <summary>   /// 单一实例   /// </summary>   public static PanGuLuceneHelper instance   {    get    {     if (_instance == null) _instance = new PanGuLuceneHelper();     return _instance;    }   }   #endregion   #region 00一些属性和参数   #region Lucene.Net的目录-参数   private Lucene.Net.Store.Directory _directory_luce = null;   /// <summary>   /// Lucene.Net的目录-参数   /// </summary>   public Lucene.Net.Store.Directory directory_luce   {    get    {     if (_directory_luce == null) _directory_luce = Lucene.Net.Store.FSDirectory.Open(directory);     return _directory_luce;    }   }   #endregion   #region 索引在硬盘上的目录   private System.IO.DirectoryInfo _directory = null;   /// <summary>   /// 索引在硬盘上的目录   /// </summary>   public System.IO.DirectoryInfo directory   {    get    {     if (_directory == null)     {      string dirPath = AppDomain.CurrentDomain.BaseDirectory + "SearchIndex";      if (System.IO.Directory.Exists(dirPath) == false) _directory = System.IO.Directory.CreateDirectory(dirPath);      else _directory = new System.IO.DirectoryInfo(dirPath);     }     return _directory;    }   }   #endregion   #region 分析器   private Analyzer _analyzer = null;   /// <summary>   /// 分析器   /// </summary>   public Analyzer analyzer   {    get    {     {      _analyzer = new Lucene.Net.Analysis.PanGu.PanGuAnalyzer();//            }     return _analyzer;    }   }   #endregion   #region 版本号枚举类   private static Lucene.Net.Util.Version _version = Lucene.Net.Util.Version.LUCENE_30;   /// <summary>   /// 版本号枚举类   /// </summary>   public Lucene.Net.Util.Version version   {    get    {     return _version;    }   }   #endregion   #endregion   #region 01创建索引   /// <summary>   /// 创建索引(先删 后更新)   /// </summary>   /// <param name="datalist"></param>   /// <returns></returns>   public bool CreateIndex(List<SearchResult> datalist)   {    IndexWriter writer = null;    try    {     writer = new IndexWriter(directory_luce, analyzer, false, IndexWriter.MaxFieldLength.LIMITED);//false表示追加（true表示删除之前的重新写入）    }    catch    {     writer = new IndexWriter(directory_luce, analyzer, true, IndexWriter.MaxFieldLength.LIMITED);//false表示追加（true表示删除之前的重新写入）    }    foreach (SearchResult data in datalist)    {     writer.DeleteDocuments(new Term("id", data.id.ToString()));//新增前 删除  不然会有重复数据     CreateIndex(writer, data);    }    writer.Optimize();    writer.Dispose();    return true;   }   public bool CreateIndex(SearchResult data)   {    List<SearchResult> datalist = new List<SearchResult>();    datalist.Add(data);    return CreateIndex(datalist);   }    public bool CreateIndex(IndexWriter writer, SearchResult data)   {    try    {     if (data == null) return false;     Document doc = new Document();     Type type = data.GetType();//assembly.GetType("Reflect_test.PurchaseOrderHeadManageModel", true, true); //命名空间名称 + 类名      //创建类的实例      //object obj = Activator.CreateInstance(type, true);       //获取公共属性      PropertyInfo[] Propertys = type.GetProperties();     for (int i = 0; i < Propertys.Length; i++)     {      //Propertys[i].SetValue(Propertys[i], i, null); //设置值      PropertyInfo pi = Propertys[i];      string name = pi.Name;      object objval = pi.GetValue(data, null);      string value = objval == null ? "" : objval.ToString(); //值             if (name == "id" || name == "flag")//id在写入索引时必是不分词，否则是模糊搜索和删除，会出现混乱      {       doc.Add(new Field(name, value, Field.Store.YES, Field.Index.NOT_ANALYZED));//id不分词      }      else      {       doc.Add(new Field(name, value, Field.Store.YES, Field.Index.ANALYZED));      }     }     writer.AddDocument(doc);    }    catch (System.IO.FileNotFoundException fnfe)    {     throw fnfe;    }    return true;   }   #endregion   #region 02在title和content字段中查询数据   /// <summary>   /// 在title和content字段中查询数据   /// </summary>   /// <param name="keyword"></param>   /// <returns></returns>   public List<SearchResult> Search(string keyword)   {    string[] fileds = { "title", "content" };//查询字段         QueryParser parser = null;    parser = new MultiFieldQueryParser(version, fileds, analyzer);//多个字段查询    Query query = parser.Parse(keyword);    int n = 1000;    IndexSearcher searcher = new IndexSearcher(directory_luce, true);//true-表示只读    TopDocs docs = searcher.Search(query, (Filter)null, n);    if (docs == null || docs.TotalHits == 0)    {     return null;    }    else    {     List<SearchResult> list = new List<SearchResult>();     int counter = 1;     foreach (ScoreDoc sd in docs.ScoreDocs)//遍历搜索到的结果     {      try      {       Document doc = searcher.Doc(sd.Doc);       int id = int.Parse(doc.Get("id"));       string title = doc.Get("title");       string content = doc.Get("content");       string blogTag = doc.Get("blogTag");       string url = doc.Get("url");       int flag = int.Parse(doc.Get("flag"));       int clickQuantity = int.Parse(doc.Get("clickQuantity"));       string createdate = doc.Get("createdate");       PanGu.HighLight.SimpleHTMLFormatter simpleHTMLFormatter = new PanGu.HighLight.SimpleHTMLFormatter("<font color=/"red/">", "</font>");       PanGu.HighLight.Highlighter highlighter = new PanGu.HighLight.Highlighter(simpleHTMLFormatter, new PanGu.Segment());       highlighter.FragmentSize = 50;       content = highlighter.GetBestFragment(keyword, content);       string titlehighlight = highlighter.GetBestFragment(keyword, title);       if (titlehighlight != "") title = titlehighlight;       list.Add(new SearchResult(title, content, url, blogTag, id, clickQuantity, flag));      }      catch (Exception ex)      {       Console.WriteLine(ex.Message);      }      counter++;     }     return list;    }    //st.Stop();    //Response.Write("查询时间：" + st.ElapsedMilliseconds + " 毫秒<br/>");    }   #endregion   #region 03在不同的分类下再根据title和content字段中查询数据(分页)   /// <summary>   /// 在不同的类型下再根据title和content字段中查询数据(分页)   /// </summary>   /// <param name="_flag">分类,传空值查询全部</param>   /// <param name="keyword"></param>   /// <param name="PageIndex"></param>   /// <param name="PageSize"></param>   /// <param name="TotalCount"></param>   /// <returns></returns>   public List<SearchResult> Search(string _flag, string keyword, int PageIndex, int PageSize)   {    if (PageIndex < 1) PageIndex = 1;    Stopwatch st = Stopwatch.StartNew();    st.Start();    BooleanQuery bq = new BooleanQuery();    if (_flag != "")    {     QueryParser qpflag = new QueryParser(version, "flag", analyzer);     Query qflag = qpflag.Parse(_flag);     bq.Add(qflag, Occur.MUST);//与运算    }    if (keyword != "")    {     string[] fileds = { "blogTag", "title", "content" };//查询字段     QueryParser parser = null;// new QueryParser(version, field, analyzer);//一个字段查询     parser = new MultiFieldQueryParser(version, fileds, analyzer);//多个字段查询     Query queryKeyword = parser.Parse(keyword);     bq.Add(queryKeyword, Occur.MUST);//与运算    }    TopScoreDocCollector collector = TopScoreDocCollector.Create(PageIndex * PageSize, false);    IndexSearcher searcher = new IndexSearcher(directory_luce, true);//true-表示只读    searcher.Search(bq, collector);    if (collector == null || collector.TotalHits == 0)    {     //TotalCount = 0;     return null;    }    else    {     int start = PageSize * (PageIndex - 1);     //结束数     int limit = PageSize;     ScoreDoc[] hits = collector.TopDocs(start, limit).ScoreDocs;     List<SearchResult> list = new List<SearchResult>();     int counter = 1;     //TotalCount = collector.TotalHits;     st.Stop();     //st.ElapsedMilliseconds;//毫秒     foreach (ScoreDoc sd in hits)//遍历搜索到的结果     {      try      {       Document doc = searcher.Doc(sd.Doc);       int id = int.Parse(doc.Get("id"));       string title = doc.Get("title");       string content = doc.Get("content");       string blogTag = doc.Get("blogTag");       string url = doc.Get("url");       int flag = int.Parse(doc.Get("flag"));       int clickQuantity = int.Parse(doc.Get("clickQuantity"));       content = Highlight(keyword, content);       //string titlehighlight = Highlight(keyword, title);       //if (titlehighlight != "") title = titlehighlight;       list.Add(new SearchResult(title, content, url, blogTag, id, clickQuantity, flag));      }      catch (Exception ex)      {       Console.WriteLine(ex.Message);      }      counter++;     }     return list;    }   }   #endregion   #region 把content按照keywords进行高亮   /// <summary>   /// 把content按照keywords进行高亮   /// </summary>   /// <param name="keywords"></param>   /// <param name="content"></param>   /// <returns></returns>   private static string Highlight(string keywords, string content)   {    SimpleHTMLFormatter simpleHTMLFormatter = new PanGu.HighLight.SimpleHTMLFormatter("<strong>", "</strong>");    Highlighter highlighter = new PanGu.HighLight.Highlighter(simpleHTMLFormatter, new Segment());    highlighter.FragmentSize = 200;    return highlighter.GetBestFragment(keywords, content);   }   #endregion   #region 04删除索引   #region 删除索引数据（根据id）   /// <summary>   /// 删除索引数据（根据id）   /// </summary>   /// <param name="id"></param>   /// <returns></returns>   public bool Delete(string id)   {    bool IsSuccess = false;    Term term = new Term("id", id);    IndexWriter writer = new IndexWriter(directory_luce, analyzer, false, IndexWriter.MaxFieldLength.LIMITED);    writer.DeleteDocuments(term); // writer.DeleteDocuments(term)或者writer.DeleteDocuments(query);       writer.Commit();    IsSuccess = writer.HasDeletions();    writer.Dispose();    return IsSuccess;   }   #endregion   #region 删除全部索引数据   /// <summary>   /// 删除全部索引数据   /// </summary>   /// <returns></returns>   public bool DeleteAll()   {    bool IsSuccess = true;    try    {     IndexWriter writer = new IndexWriter(directory_luce, analyzer, false, IndexWriter.MaxFieldLength.LIMITED);     writer.DeleteAll();     writer.Commit();     IsSuccess = writer.HasDeletions();     writer.Dispose();    }    catch    {     IsSuccess = false;    }    return IsSuccess;   }   #endregion   #endregion   #region 分词测试   /// <summary>   /// 分词测试   /// </summary>   /// <param name="keyword"></param>   /// <returns></returns>   public string Token(string keyword)   {    string ret = "";    System.IO.StringReader reader = new System.IO.StringReader(keyword);    Lucene.Net.Analysis.TokenStream ts = analyzer.TokenStream(keyword, reader);    bool hasNext = ts.IncrementToken();    Lucene.Net.Analysis.Tokenattributes.ITermAttribute ita;    while (hasNext)    {     ita = ts.GetAttribute<Lucene.Net.Analysis.Tokenattributes.ITermAttribute>();     ret += ita.Term + "|";     hasNext = ts.IncrementToken();    }    ts.CloneAttributes();    reader.Close();    analyzer.Close();    return ret;   }   #endregion  } 

public class SearchResult {  public SearchResult() { }  public SearchResult(string title, string content, string url, string blogTag, int id, int clickQuantity, int flag)  {   this.blogTag = blogTag;   this.clickQuantity = clickQuantity;   this.content = content;   this.id = id;   this.url = url;   this.title = title;   this.flag = flag;  }  /// <summary>  /// 标题  /// </summary>  public string title { get; set; }  /// <summary>  /// 正文内容  /// </summary>  public string content { get; set; }  /// <summary>  /// url地址  /// </summary>  public string url { get; set; }  /// <summary>  /// tag标签  /// </summary>  public string blogTag { get; set; }  /// <summary>  /// 唯一id  /// </summary>  public int id { get; set; }  /// <summary>  /// 点击量  /// </summary>  public int clickQuantity { get; set; }  /// <summary>  /// 标记（用户）   /// </summary>  public int flag { get; set; } }